Apparatus for forming tubular articles



May 18, 1937. c. J. KELLER 2,081,038

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APPARATUS FOR FORMING TUBULAR ARTICLES Filed Aug. 3l, 1953 19Sheets-Sheet 5 BY Wmi I ATTORNEYd/ u May 18, 1937.

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NN 's H ma h lNvENToR L'rence 11.159! [er Y BY Patented May 18, 1937APPARATUS FOR FORMING' TUBULAR ARTICLES Clarence J. Keller, Anderson,Ind., assigner, by

mesne assignments, to General Motors Corporation, Detroit, Mich., acorporation of Dela- Ware Application August 31, 1933, Serial No.687,621

89 Claims.

'Ihis invention relates to the manufacture of tubular articles and moreparticularly to an apparatus for forming tubular articles from acontinuous strip of sheet material.

It is an object of the present invention to provide for the forming oftubular articles through progressive stages from a continuous strip ofsheet material in an expeditious manner and with the least possibleamount of scrap material.

Another object of the present invention is to provide for knurling aportion of a tubular article.

Another object of the present invention is to provide for thecontraction of an end portion of a tubular article to reduce the same.

Another object of the present invention is to provide for crimping anend portion of a tubular article into a flange extending transversely ofthe axis of the article.

Another object of the present invention is to provide for the formationof raised beads in the periphery of a tubular article.

Still another object of the present invention is to provide for theformation of a sunken bead in the periphery of a tubular article.

Further objects and advantages of the present invention will be apparentfrom the following description, reference being had to the accompanyingdrawings wherein a preferred embodiment of one form of the presentinvention is clearly shown.

In the drawings:

Fig. 1 illustrates progressive steps of the method for forming tubulararticles from a strip of sheet material.

Fig. 2 is a fragmentaryperspective view of a machine embodying thepresent invention.

Fig. 3 is another fragmentary perspective view of the machine, viewed inthe direction of arrow 3 in Fig. 2.

Fig. 4 is an enlarged fragmentary perspective view of a portion of themachine looking in the direction of the arrow 4 in Fig. 3.

Fig. 5 is another enlarged fragmentary perspective view of the machinelooking in the direction of arrow 5 in Fig. 4.

Figs. 6 and 7 together are a plan View of the lower die plate and theparts carried thereby.

Fig. '7a is a fragmentary sectional view taken on the line 'la- 1a. ofFig. 7.

Fig. 8 is a bottom view of the upper die plate and parts carriedthereby.

Fig. 9 discloses the feeding device and its operating parts.

Fig. 9a is an enlarged sectional View showing the cooperation betweenthe two feed rolls and is taken on the line Sia-9a. of Fig. 9.

Fig. 10 is a side elevation ofthe feeding device and its operatingparts, 'viewed in the direction of arrow I0 in Fig. 9.

Fig. 11 isa sectional view of cooperating members, carried by the lowerand upper die plates, and is taken along the line Il--H of Fig. 6.

Fig.. 12 is a view similar to Fig. 11, showing, however, the upper dieplates and parts carried thereby in a different relative position.

Figs. 13 and 14 together are a cross-sectional view of the upper andlower die plate with the parts carried thereby in operative position.The section being taken on the lines |3-I 3 and Ill-M 15 of Figs. 6 and'7, respectively.

Figs. 15 and 16 together form a cross-sectional view similar to Figs. 13and 14, showing, however, the parts carried by the upper die plate ininoperative position. 20

Fig. 15a is a fragmentary perspective view of a detail of the machine.

Fig. 17 is a sectional view taken on the line l'l-Il of Fig. '7.

Fig. 18 is a sectional view taken on the line i8-I8 of Fig. 13.

Fig. 19 is a sectional view taken on the line ISI-I9 of Fig. 6.

' Fig. 20 is a sectional View similar to Fig. 19,v showing however, ltheupper die plate in another position.

Fig. 21 is a sectional view taken on the line 2.|-2l of Fig. 7.

Fig. 22 is a sectional view similar to Fig. 21 showing, however, theupper die plate in another position.

Fig. 23 is a sectional view taken on the line 23-23 of Fig. 15.

Fig. 24 is a fragmentary sectional view showing a portion of Fig. 23with the upper die in operative position.

Fig. 25 is a sectional view tal-:en on the 25-25 of Fig. 15.

Fig. 26 is a sectional view taken on the line 26--26 of Fig. 13.

Fig. 27 is an enlarged fragmentary sectional View taken substantially onthe line 21-21 of Fig. 6, showing an article shortly before one endthereof is crimped inwardly.

Fig. 28 is a view similar to Fig. 27, showing, however, the end of thearticle crimped inwardly.

Fig. 29 is a sectional view taken on the line' 29-29 of Figs. '7 and 14.

